US4004615A - Parts subject to wear in separators, cyclones, pipelines and similar apparatus - Google Patents

Parts subject to wear in separators, cyclones, pipelines and similar apparatus Download PDF

Info

Publication number
US4004615A
US4004615A US05/547,044 US54704475A US4004615A US 4004615 A US4004615 A US 4004615A US 54704475 A US54704475 A US 54704475A US 4004615 A US4004615 A US 4004615A
Authority
US
United States
Prior art keywords
wear member
wear
flow
member according
elongated means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/547,044
Inventor
Hans Stern, deceased
Werner Strauss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Application granted granted Critical
Publication of US4004615A publication Critical patent/US4004615A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/002—Influencing flow of fluids by influencing the boundary layer
    • F15D1/0025—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply
    • F15D1/003—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions
    • F15D1/0035—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions in the form of riblets
    • F15D1/0045—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions in the form of riblets oriented essentially perpendicular to the direction of flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/085—Vortex chamber constructions with wear-resisting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits
    • F15D1/06—Influencing flow of fluids in pipes or conduits by influencing the boundary layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12153—Interconnected void structure [e.g., permeable, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • Y10T428/12396—Discontinuous surface component

Definitions

  • the invention relates to a method of increasing the durability of parts subject to wear or wear members in separators, cyclones, pipelines and similar apparatus, wherein the wear members are abrasively worn by a particle-conducting flow; and to a device produced by the method.
  • the step of forming a marginal layer of considerable thickness at the surface of the wear members has the advantage that the abrasive particles present in the flow are held spaced from the surface of the wear members. Due to the increase in the thickness of the marginal layer, an air cushion is produced on the surface of the wear members and is formed of a stationary layer of the flow-capable medium, which swirls about within itself. In the air cushion, the component of the entrained particles sinks downwardly essentially and, for a simultaneously reduced velocity of the particles, no abrasive effect is thus exerted any longer on the wear members.
  • the formation of the enlarged marginal layer is effected by producing an increase in the macro-surface roughness of the wear members.
  • This construction according to the invention has the advantage that a measure that is relatively easy to carry out is involved, that the measure can be carried out without very great expense and reliably produces a considerable increase in the marginal layer.
  • the flow referred to herein is always of the turbulent type wherein the formation of an increased marginal layer by changing the micro-roughness of the wear member is not possible.
  • micro-roughness there is understood to mean a roughness produced by machining or treatment which is ordinarily below a roughness depth of 0.1 mm. Also, it is impossible to attain a marginal layer increase by varying the inner friction of the flowing media, because this measure would be connected with considerable expense.
  • the increase in the macro-surface roughness occurs through the formation of holes or beads or corrugations, preferably through the formation of elongated holes or slots, in the wear members.
  • elongated holes greatly desired weight-saving in the wear members is effected, which permits a more lightweight construction of the entire structure.
  • the same flow-dynamic effect is attained by the use of corrugations and, although no weight-saving results therefrom, nevertheless, a light, self-hardened construction is obtained.
  • the increase in the macro-surface roughness is produced by forming ribs or bulges on the surface of the wear members.
  • the elongated holes, corrugations, ribs or the like extend transversely to the direction of flow in offset relationship one to another. This disposition thereof permits the best effect upon the marginal layer, because always new, small turbulence fronts, which lead to an increase in the marginal layer, are formed behind the transversely disposed elongated holes or ribs. Due to the mutually offset array, flow apertures developing between the individual elongated holes or corrugations or ribs are opened so that, although only short flow barriers become constructed, a penetrating barrier front is formed for the flow.
  • the elongated holes, ribs or corrugations have a length-to-width ratio of from substantially 4:1 substantially 8:1.
  • Elongated holes, ribs or corrugations having such a length-to-width ratio are capable of being produced especially easily because the tools necessary for producing these flow barriers are relatively easy to produce and to assemble.
  • For small ratios of length-to-width such advantageous conditions or relationships are not obtained, since the flow barriers approximate bulges or knobs, and for very long flow barriers, the required tools and devices become too costly.
  • the elongated holes, ribs or corrugations have rounded or beveled edges.
  • the surface in which the elongated holes are formed and the surface of the ribs or corrugations are hardened, preferably cold hardened.
  • FIG. 1 is a fragmentary sectional view of a wear member wherein the marginal layer is formed of corrugations
  • FIG. 2 is a fragmentary plan view of another wear member wherein the marginal layer is formed of longitudinal holes or slots;
  • FIG. 3 is a fragmentary sectional view of yet another wear member wherein the marginal layer is formed of ribs disposed on the surface of the wear member.
  • FIG. 1 there is shown the surface 1 of a wear member that is formed with upwardly curved corrugations 2.
  • the surface level 1 is shown between the corrugations 2, and the corrugations 2 are disposed in offset or staggered array on the surface 1.
  • the elongated holes or slots 3 are readily visible and are, like the corrugations 2 in the embodiment of FIG. 1, staggered or offset with respect to one another.
  • the surface 1 of the wear member carrier ribs 4 which are also offset or staggered relative to one another, the ribs 4 rising above virtually the entire surface area of the wear member.

Abstract

Wear members in separators, cyclones, pipelines and similar apparatus, which are abrasively worn by a particle-conducting flow, said wear members having increased durability as a result of increased surface roughness.

Description

The invention relates to a method of increasing the durability of parts subject to wear or wear members in separators, cyclones, pipelines and similar apparatus, wherein the wear members are abrasively worn by a particle-conducting flow; and to a device produced by the method.
With all flowing media that are employed for treating or transporting granular materials, the difficulty arises that the transported materials, due to the abrasive action thereof, exert a marked wearing effect on housing walls, fan blades, pipeline bends or elbows, drip tubes and the like. For this reason, many of these parts have only limited durability and must be replaced from time to time. This is especially true for blower or fan impellers in gyratory separators.
Heretofore, through the insertion of hardened metals, cast plates or surface-hardened materials, efforts have been made to keep this abrasive effect of the entrained particles as minimal as possible.
These heretofore known, prior-art solutions, however, considerably increase the cost of the respective parts and, in addition, offer only inadequate protection against the abrasive effect of the respective transported particles. In many cases, an effort has been made, therefore, to achieve an improvement in durability by coating the parts with synthetic or plastic materials or hard rubber. In the case of rapidly moving machine parts wherein great accelerations occur, this solution is not possible, however, because the accelerations that occur produce stressing beyond the tensile-strength limit of the wear-resistant materials. Similarly, the use of these materials, when there is temperature stressing, is not possible.
It is accordingly an object of the invention to provide a method and device for increasing the durability of wear members in separators, cyclones, pipelines and similar apparatus which avoids the disadvantages of the heretofore known devices of this general type. More specifically, it is an object of the invention to provide such a method and device at minimal expense and which has a tensile strength that resists the stressing occurring in rapidly moving machine parts, for example.
With the foregoing and other objects in view, there is provided, in accordance with the method of the invention, the step of forming a marginal layer of considerable thickness at the surface of the wear members. This construction, according to the invention, has the advantage that the abrasive particles present in the flow are held spaced from the surface of the wear members. Due to the increase in the thickness of the marginal layer, an air cushion is produced on the surface of the wear members and is formed of a stationary layer of the flow-capable medium, which swirls about within itself. In the air cushion, the component of the entrained particles sinks downwardly essentially and, for a simultaneously reduced velocity of the particles, no abrasive effect is thus exerted any longer on the wear members.
In accordance with another feature of the invention, the formation of the enlarged marginal layer is effected by producing an increase in the macro-surface roughness of the wear members. This construction according to the invention has the advantage that a measure that is relatively easy to carry out is involved, that the measure can be carried out without very great expense and reliably produces a considerable increase in the marginal layer. Because of the relatively high flow velocities, the flow referred to herein is always of the turbulent type wherein the formation of an increased marginal layer by changing the micro-roughness of the wear member is not possible. By micro-roughness there is understood to mean a roughness produced by machining or treatment which is ordinarily below a roughness depth of 0.1 mm. Also, it is impossible to attain a marginal layer increase by varying the inner friction of the flowing media, because this measure would be connected with considerable expense.
In accordance with a further feature of the invention, the increase in the macro-surface roughness occurs through the formation of holes or beads or corrugations, preferably through the formation of elongated holes or slots, in the wear members. With the use of elongated holes, greatly desired weight-saving in the wear members is effected, which permits a more lightweight construction of the entire structure. The same flow-dynamic effect is attained by the use of corrugations and, although no weight-saving results therefrom, nevertheless, a light, self-hardened construction is obtained.
In accordance with an alternate feature of this invention, the increase in the macro-surface roughness is produced by forming ribs or bulges on the surface of the wear members. Thereby, with structural parts with which a weight increase is of little importance, a reinforcement of the wear member is advantageously achieved and, especially, protection is provided against the coarser particles, which eventually penetrate the marginal layer, and which had been entrained by the flow.
In accordance with the device of the invention, the elongated holes, corrugations, ribs or the like extend transversely to the direction of flow in offset relationship one to another. This disposition thereof permits the best effect upon the marginal layer, because always new, small turbulence fronts, which lead to an increase in the marginal layer, are formed behind the transversely disposed elongated holes or ribs. Due to the mutually offset array, flow apertures developing between the individual elongated holes or corrugations or ribs are opened so that, although only short flow barriers become constructed, a penetrating barrier front is formed for the flow.
Furthermore, in accordance with yet another feature of the invention, the elongated holes, ribs or corrugations have a length-to-width ratio of from substantially 4:1 substantially 8:1. Elongated holes, ribs or corrugations having such a length-to-width ratio are capable of being produced especially easily because the tools necessary for producing these flow barriers are relatively easy to produce and to assemble. For small ratios of length-to-width, such advantageous conditions or relationships are not obtained, since the flow barriers approximate bulges or knobs, and for very long flow barriers, the required tools and devices become too costly.
In accordance with additional features of the invention, the elongated holes, ribs or corrugations have rounded or beveled edges. Through these features, it is advantageously possible to protect the edges that could become damaged and that would break off, especially due to the coarse particles of material which are entrained by the flow and may penetrate the marginal layer.
In accordance with a concomitant feature of the invention, the surface in which the elongated holes are formed and the surface of the ribs or corrugations are hardened, preferably cold hardened. Thereby, an advantageous improved durability is attained as a result of the hardened surface, the surface hardening occurring expediently when the elongated holes or corrugations are formed, so that no additional costly operation is required. The durability of the wear surface is thereby further increased.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as method and device for increasing the durability of parts subject to wear in separators, cyclones, pipelines and the like, it is nevertheless not intended to be limited to the details shown, since various modifications may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The invention, however, together with additional objects and advantages thereof will be best understood from the following description when read in connection with the accompanying drawing, in which:
FIG. 1 is a fragmentary sectional view of a wear member wherein the marginal layer is formed of corrugations;
FIG. 2 is a fragmentary plan view of another wear member wherein the marginal layer is formed of longitudinal holes or slots; and
FIG. 3 is a fragmentary sectional view of yet another wear member wherein the marginal layer is formed of ribs disposed on the surface of the wear member.
Referring now to the figures and, first, particularly to FIG. 1 thereof, there is shown the surface 1 of a wear member that is formed with upwardly curved corrugations 2. Thus, the surface level 1 is shown between the corrugations 2, and the corrugations 2 are disposed in offset or staggered array on the surface 1.
In FIG. 2, the elongated holes or slots 3 are readily visible and are, like the corrugations 2 in the embodiment of FIG. 1, staggered or offset with respect to one another.
In the embodiment of FIG. 3, the surface 1 of the wear member carrier ribs 4 which are also offset or staggered relative to one another, the ribs 4 rising above virtually the entire surface area of the wear member.

Claims (8)

We claim:
1. In apparatus in which there is a particle-conducting flow, such as separators, cyclones, pipelines and similar apparatus, and where a part of said apparatus, designated wear members, is in contact with said particle-conducting flow and is abrasively worn by said particle-conducting flow, the improvement comprising a plurality of spaced depressions in said contact surface of said wear member producing an increase in the macro surface roughness above a roughness depth of 0.1 mm, of the wear member and forming a flow-marginal layer at the surface of the wear member spacing the abrasive particles in the flow from the surface of the wear member and in which layer entrained particles sink downwardly at reduced velocity with reduced abrasive effect.
2. Apparatus having wear member according to claim 1 wherein said depressions constitute a multiplicity of elongated means extending transversely to the direction of flow in offset relationship one to another.
3. Apparatus having wear member according to claim 2 wherein said multiplicity of elongated means are formed as slots in the surface of the wear members.
4. Wear member according to claim 2 wherein said multiplicity of elongated means are formed as ribs on the surface of the wear members.
5. Apparatus having wear member according to claim 2 wherein said elongated means have a length-to-width ratio of from substantially 4:1 to 8:1.
6. Apparatus having wear member according to claim 2 wherein said elongated means have rounded edges.
7. Wear member according to claim 2 wherein said elongated means have beveled edges.
8. Apparatus having wear member according to claim 2 wherein said elongated means have a strain-hardened surface.
US05/547,044 1974-02-04 1975-02-04 Parts subject to wear in separators, cyclones, pipelines and similar apparatus Expired - Lifetime US4004615A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DT2405298 1974-02-04
DE19742405298 DE2405298A1 (en) 1974-02-04 1974-02-04 METHOD AND DEVICE FOR INCREASING THE SERVICE LIFE OF WEAR PARTS IN LIVERS, CYCLONES AND PIPES

Publications (1)

Publication Number Publication Date
US4004615A true US4004615A (en) 1977-01-25

Family

ID=5906584

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/547,044 Expired - Lifetime US4004615A (en) 1974-02-04 1975-02-04 Parts subject to wear in separators, cyclones, pipelines and similar apparatus

Country Status (2)

Country Link
US (1) US4004615A (en)
DE (1) DE2405298A1 (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218041A (en) * 1976-12-22 1980-08-19 IT&T Industries, Inc. Low noise slide valve
US4260658A (en) * 1979-06-21 1981-04-07 Kobe, Inc. Erosion resistant surface
US4269872A (en) * 1979-06-21 1981-05-26 Kobe, Inc. Method of producing an erosion resistant surface
US4372528A (en) * 1981-07-06 1983-02-08 Red Valve Co., Inc. Pinch valve sleeve
US4575284A (en) * 1981-07-22 1986-03-11 Flexi-Coil Ltd. Distribution tube for pneumatic applicator
US4600410A (en) * 1984-12-19 1986-07-15 Atlantic Richfield Company Process and apparatus for separating particulate matter from a gaseous medium
US4621953A (en) * 1984-12-14 1986-11-11 Foster Wheeler Energy Corporation Anti-erosion protrusions for wear surfaces in fluid conduits
EP0243294A1 (en) * 1986-02-27 1987-10-28 Siemens Aktiengesellschaft Flow measurement arrangement
WO1991002207A1 (en) * 1989-08-09 1991-02-21 Clifford, Bryan, Thomas Heat exchangers
WO1993011401A1 (en) * 1991-11-27 1993-06-10 Hendricks John B Perforated plates for cryogenic regenerators and method of fabrication
WO1995030120A1 (en) * 1994-04-28 1995-11-09 Hendricks John B Perforated plate filter media and related products
US6267803B1 (en) * 1997-06-26 2001-07-31 International Paper Company Abrasive wear barrier
EP1153662A1 (en) * 2000-05-12 2001-11-14 KHD Humboldt Wedag AG Heat- and wear stressed mounting element, in particular segment for cyclon vortex finder
EP1715196A1 (en) * 2005-04-22 2006-10-25 Agru Kunststofftechnik Gmbh Synthetic panels to cover concrete constructions parts
US20160123125A1 (en) * 2014-10-29 2016-05-05 Schlumberger Technology Corporation System and method for dispersing fluid flow from high speed jet
US20210054859A1 (en) * 2019-08-21 2021-02-25 Lockheed Martin Corporation Partially submerged periodic riblets
US20220233974A1 (en) * 2021-01-28 2022-07-28 Safe 'N' Sound Appliances Inc. Tamper-proof single piece fluid sediment trap

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919668C2 (en) * 1989-06-16 1998-04-16 Babcock Energie Umwelt Vapor separator for a fan mill
DE4416757C2 (en) * 1994-05-13 1997-04-10 Zeppelin Schuettguttech Gmbh Deflection-counterflow classifier
DE102019122890A1 (en) * 2019-08-27 2021-03-04 Gebr. Pfeiffer Se Device for the preparation of ground material

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US107006A (en) * 1870-09-06 Improvement in wire for wire goods
US1053614A (en) * 1913-02-18 Mahlon E Layne Blank for making perforated tubing.
US2064322A (en) * 1933-10-11 1936-12-15 Western Electric Co Method of surface finishing articles
US2396114A (en) * 1944-05-19 1946-03-05 John F Neuerburg Lighter flint
US2407671A (en) * 1938-08-05 1946-09-17 Mesnel Pierre Guideway for sliding windows
FR1089219A (en) * 1953-09-07 1955-03-15 Process for deforming malleable materials into ribbed sheets and plates obtained by the process
US2925650A (en) * 1956-01-30 1960-02-23 Pall Corp Method of forming perforate metal sheets
US3047091A (en) * 1960-03-10 1962-07-31 John E Gerli Muffler
US3258318A (en) * 1963-09-10 1966-06-28 Rheinische Blattmetall Ag Etched metal foil for electrolytic capacitors and the like consisting of silver-aluminum alloys
US3352769A (en) * 1967-01-11 1967-11-14 Ruben Samuel Process for producing microperforated stainless steel sheets
US3869778A (en) * 1971-12-27 1975-03-11 Raymond W Yancey Article of manufacture with twisted web
US3905775A (en) * 1972-12-12 1975-09-16 Du Pont Module
US3934614A (en) * 1974-09-23 1976-01-27 Zoltan Elek Energy dissipator ring

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US107006A (en) * 1870-09-06 Improvement in wire for wire goods
US1053614A (en) * 1913-02-18 Mahlon E Layne Blank for making perforated tubing.
US2064322A (en) * 1933-10-11 1936-12-15 Western Electric Co Method of surface finishing articles
US2407671A (en) * 1938-08-05 1946-09-17 Mesnel Pierre Guideway for sliding windows
US2396114A (en) * 1944-05-19 1946-03-05 John F Neuerburg Lighter flint
FR1089219A (en) * 1953-09-07 1955-03-15 Process for deforming malleable materials into ribbed sheets and plates obtained by the process
US2925650A (en) * 1956-01-30 1960-02-23 Pall Corp Method of forming perforate metal sheets
US3047091A (en) * 1960-03-10 1962-07-31 John E Gerli Muffler
US3258318A (en) * 1963-09-10 1966-06-28 Rheinische Blattmetall Ag Etched metal foil for electrolytic capacitors and the like consisting of silver-aluminum alloys
US3352769A (en) * 1967-01-11 1967-11-14 Ruben Samuel Process for producing microperforated stainless steel sheets
US3869778A (en) * 1971-12-27 1975-03-11 Raymond W Yancey Article of manufacture with twisted web
US3905775A (en) * 1972-12-12 1975-09-16 Du Pont Module
US3934614A (en) * 1974-09-23 1976-01-27 Zoltan Elek Energy dissipator ring

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218041A (en) * 1976-12-22 1980-08-19 IT&T Industries, Inc. Low noise slide valve
US4260658A (en) * 1979-06-21 1981-04-07 Kobe, Inc. Erosion resistant surface
US4269872A (en) * 1979-06-21 1981-05-26 Kobe, Inc. Method of producing an erosion resistant surface
US4372528A (en) * 1981-07-06 1983-02-08 Red Valve Co., Inc. Pinch valve sleeve
US4575284A (en) * 1981-07-22 1986-03-11 Flexi-Coil Ltd. Distribution tube for pneumatic applicator
US4685843A (en) * 1981-07-22 1987-08-11 Flexi-Coil Ltd. Method of uniformly distributing granular material
US4621953A (en) * 1984-12-14 1986-11-11 Foster Wheeler Energy Corporation Anti-erosion protrusions for wear surfaces in fluid conduits
US4600410A (en) * 1984-12-19 1986-07-15 Atlantic Richfield Company Process and apparatus for separating particulate matter from a gaseous medium
EP0243294A1 (en) * 1986-02-27 1987-10-28 Siemens Aktiengesellschaft Flow measurement arrangement
US5298337A (en) * 1989-07-05 1994-03-29 Alabama Cryogenic Engineering, Inc. Perforated plates for cryogenic regenerators and method of fabrication
WO1991002207A1 (en) * 1989-08-09 1991-02-21 Clifford, Bryan, Thomas Heat exchangers
WO1993011401A1 (en) * 1991-11-27 1993-06-10 Hendricks John B Perforated plates for cryogenic regenerators and method of fabrication
WO1995030120A1 (en) * 1994-04-28 1995-11-09 Hendricks John B Perforated plate filter media and related products
US6267803B1 (en) * 1997-06-26 2001-07-31 International Paper Company Abrasive wear barrier
EP1153662A1 (en) * 2000-05-12 2001-11-14 KHD Humboldt Wedag AG Heat- and wear stressed mounting element, in particular segment for cyclon vortex finder
EP1715196A1 (en) * 2005-04-22 2006-10-25 Agru Kunststofftechnik Gmbh Synthetic panels to cover concrete constructions parts
WO2006111418A3 (en) * 2005-04-22 2006-12-28 Agru Kunststofftechnik Gmbh Plastic plate for lining concrete components
US20160123125A1 (en) * 2014-10-29 2016-05-05 Schlumberger Technology Corporation System and method for dispersing fluid flow from high speed jet
US10900338B2 (en) * 2014-10-29 2021-01-26 Schlumberger Technology Corporation System and method for dispersing fluid flow from high speed jet
US20210054859A1 (en) * 2019-08-21 2021-02-25 Lockheed Martin Corporation Partially submerged periodic riblets
US11614106B2 (en) * 2019-08-21 2023-03-28 Lockheed Martin Corporation Partially submerged periodic riblets
US20220233974A1 (en) * 2021-01-28 2022-07-28 Safe 'N' Sound Appliances Inc. Tamper-proof single piece fluid sediment trap
US11772013B2 (en) * 2021-01-28 2023-10-03 Safe ‘N’ Sound Appliances Inc. Tamper-proof single piece fluid sediment trap

Also Published As

Publication number Publication date
DE2405298A1 (en) 1975-08-07

Similar Documents

Publication Publication Date Title
US4004615A (en) Parts subject to wear in separators, cyclones, pipelines and similar apparatus
US1697202A (en) Rotary pump for handling solids in suspension
US4387914A (en) Short radius, low wear elbow
US4268205A (en) Method and apparatus for removing material from the ends of a rotary air lock
KR900007251B1 (en) Blades for propeller fan
BR0208180A (en) Methods and equipment for material processing
RU96100544A (en) CUTTING DISC DEVICE
US3872624A (en) Curved vane for throwing wheels
EP0145104A2 (en) An abrasive throwing wheel
US3367116A (en) Intake grill for water jet pump
US2779455A (en) Thrower apparatus for forming a moving column of particles
US970618A (en) Abrading-wheel.
KR850000006B1 (en) Centrifugal blasting apparatus
US2057435A (en) Ventilated pulley
US2590779A (en) Water distributing apparatus for evaporative coolers
US1964525A (en) Fan blade
US4337008A (en) Apparatus for fish protection
US4260658A (en) Erosion resistant surface
US10590950B2 (en) Pump liner
US1869655A (en) Impeller blade
US2962122A (en) Dust separator
US2135939A (en) Differential pressure mechanism
US1556203A (en) Exhaust fan
SU1060451A2 (en) Shot-peening apparatus rotor blade
JPS56112460A (en) Manufacture of ring plate having edge of chain for square-hole-piercing machine